Patents by Inventor James D. Barter

James D. Barter has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6122404
    Abstract: A visible Stokes polarimetric imager (80) that separately and contemporaneously measures each of the four separate Stokes polarization parameters of a visible light beam reflected from a scene. The imager (80) includes a compound prism assembly (50) including five prism elements (52-58). The reflected beam from the scene is collected by an input lens (84) in the imager (80), and is directed to the prism assembly (50) at a certain location. The prism elements (52-58) split the beam (82) into four separate beams (62-68) of substantially equal intensity that are emitted from the prism assembly (50) in different directions. Four separate polarimetric filters (86) and imaging devices (88) are positioned relative to the prism assembly (50) to separately receive each of the four beams (62-68) emitted from the prism assembly (50).
    Type: Grant
    Filed: May 28, 1998
    Date of Patent: September 19, 2000
    Assignee: TRW Inc.
    Inventors: James D. Barter, Peter H. Y. Lee